Combination fireplace and furnace



I 1,583,374 ..C.'UH RSTROM' COMBINATION FIREPLACE AND FURNACE Filed April' 12, 1923 lNVENTOR 6/7/757/22)? U/vrJ/mm Patented May 4, 1926.

UNITED olinls'rrnn "unnsrnoiyr o-r wasrame'ron. K

eoMnrna'rIon FIREPLACE nn FURNACE.

Application filed April 12, 1923. Serial No. 631,538....

The invention is a fireplace having an in;

ner lining with air passages between the lining and the walls andopenings through the walls to the air passages at both their 15 lowerand upperends- The object of the invention is to provide a means forutilizing the heat of a fireplace that normally goes up the chimney.

Another object of the invention is to provide a lining for a fireplacewhich will leave air passages around it.

And a further object of the invention is to provide a fireplace havingan inner lining with a means for admitting cold 'air' to the passagesaround the lining at the bottom and for permitting the heated air topass out of the upper ends of the passages.

With these ends in view the invention embodies a fireplace having aninner casing,

39 passages for air between the casing and the exterior walls, andopenings at the upper and lower ends of the passages which extendthrough the exterior walls.

Other features and advantages of the invention will appear from thefollowingdescription taken in connection with the drawings, whereinFigure 1 is a front elevation with part broken away. 7

Figure 2 is a crosssection.

In the drawings 1 have shown my fireplace as it would be constructed,wherein, numeral 1 indicates the inner casing at the, base, numeral 2the upper section of the inner casing, and numeral 3 the exterior walls.

The lower section 1 of the inner casing may be made as shown in Figures1 and 2 of a rectangularshaped casting being open at the top and bottomand at the front side. The back of the section-is bent inward from apoint 4 to the top which will form a baffle to throw heat out of thefront of the fireplace. The opening 5 in the upper end 5 of the casing 1may be made as shown in Figures 1 and 2 or may be made in any de;

sired shape, andimay have a damperfi in itwhich may be operated by a rod7 from the front of the fireplace. understoodthat this damper may beomitted as theudraft may be regulated from a damper above. 'Theiuppersection2 may be made to fit over the top of the lower section and may beof a'rectangular shape as shown or of any desired shape. It may haveadamper 8 in it which may beturned by a handle 9, on they-outside of'theexterior wall.

A brick fireplace may be constructed around the casing leaving airpassages 10 and 11 on thesides, 12 at the rear, and13 above the front.These passages may be of anysuitable size or shape and may extend upwardto a point adjacent the ceiling of the room or they may extend upwardinto the second floor if desired. In the design shown I have shown ahorizontal partition 14 around the casing inside of the exterior wallwhich forms a stop for the air passage.

However, it is However, itis understoodthat this partition may be in theform of a damper or may be omitted if itiis desired. At the lower edgesof the side walls are openings 15 through which cold air may be omittedto the bottoms of the air. passages and below the partition 14 areopenings or ventilators 16 through which the heated air may pass to theroom. The Veins 17in the opening 16 may be pivot-ally mounted on pins 18so that the sizes of the openings may be adjusted.

It is understood that changes may be made in the construction withoutdeparting from the spirit of the inventions, One of which changes may bein the design of the casing as it is understood that this may be made ofany suitable size or shape and may be made in one piece instead ofseparating it into the top and lower sections or may be made in as manysections as may be desired. Another changemaybe in the location of theopenings for admitting air to and from the air passages. And stillanother change may be in the location of the damper.

The construction will be readily under stood from the foregoingdescription. To

use the device it may be installed in a fireplace as shown in Figures 1and 2 and it may be seen that as the fire is started in the lowersection 1 the wallsof the casing will become heated and air in thepassages will move upward and out of the openings 16 at the upper end ofthe passages. At the same time cold air will be admitted to the lowerends of the passages. It will be seen that with a casing of this typeconstructed in a fireplace the usual amount of heat that ordinarilypasses out of the front of the fire place will pass out in the usualmanner and the heat that is usually lost by permitting it to escape upthe chimney will heat the Walls of the interior casing and then the airsurrounding the casing will become heated. This heated air will passupward in the air passages and as it approaches the upper ends of theair passages its temperature will be increased so that when it passesinto the room through the opening 16 it will be very hot so that theroom may be thoroughly heated by the fire place. It is commonly knownthat a fireplace produces very little heat as practically all of theheat units pass up the chimney, whereas, by forming air passages aroundthe flue these heat units may be arrested and utilized to heat the room.

Having thus fully described the invention What I claim as new and desireto secure by Letters Patent, is

In an open fireplace, a firebox having the front and bottom open, thesides parallel, and the back inclined towards the front from apoint'abont one-third of the distance from the base; a damper pivotallymounted in an opening in the top of said firebox, a bar for operatingsaid damper from the front of the fireplace, a flue with its lower endforwardly inclined which rests upon the top of the firebox, a damper insaid flue at a point somewhat above the firebox, said damper beingprovided with means for operating it from a remote point, said fiuebeing provided with an outwardly extending flange at its lower end tosupport the fireplace wall over the opening, an air space around saidflue and firebox extending for a considerable distance up the flue, coldair vents opening to the bottom of said air space, and outlet vents withadjustable shutters'in them in the upper part of said air space.

CHRISTIAN UHRSTROM.

